Improvement in lightning-rod couplings



E. S. TURNER. Lightning-Rod Coupling.

No. 211,441. Patented Jan. 14, 1879.

NETERS, PNOT UNITED STATES PATENT OFFICE,

EDWARD S. TURNER, OF CHICAGO, ILLINOIS.

MPROVEMENT IN LIGHTNING-ROD COUPLINGS.

Specification forming part or' Letters Patent No. 211,441, dated January14, 1879; application filed December 4, 187C.

To all whom it may concern:

Be it known that I, EDWARD S. TURNER, of Chicago, Cool; county, andState of Illinois, have invented certain new and uset'ul Improvements inLightning-Rod Couplings, otl which the following is a full description,reference being had to the accompanying drawing, in which- Figure l isan elevation of two connected sections; Fig. 2, an elevation of a rolledsection; Fig. 3, a cross-section on line x x; Figs. a and 5,longitudinal sect-ions of the couplin gs.

rIhe object of this invention is to form a secure and effective couplingor union for lightning-rods that maybe easily and strongly applied; andits nature consists in casting extensions ento the ends ot' rolled orlight rods, so as to give a suflicient body to the coupling to give therequired strength, and in so attaching them that they will remain inplace.

In the drawings, A B represent rolled-iron or main sections oi' a rod; CD, cast or short coupling-sections, the length being indicated by dottedlines in Fig. i, a I), projections for uniting the cast and. rolledportions 5 c, male screw, d, female screw, and c a hole or openingthrough the end orends of the rolled sections.

Ihe rolled sections are made of iron or other suitable metal, and foriron are preferably made ot' the form sho wn, but my coupling may beused with other forms constructed ot' this metal. Near the ends of eachsection are erilled er punched small holes c. They are then ready forthe cast sections C D, which are made oi brass; and to apply them therods are placed in suitable molds, with cores of the proper form, andmolded in the usual way.

In molding, the cores pass beyond the holes c, so that when the sectionsare cast the metal will iiow through the hole and forni a cast rivet orbar, thus iirmly attaching thc cast to the rolled portions and unitingthe parts together. The screw c is then formed, and the thread d tapped,in the usual manner.

By this method of forming the coupling a sufficient amount and length ofcast metal can be used to make a strong and eiiicient coupling.

In order to cast them rapidly a number of cores may be attached to aplate arranged to correspond with the openings in the mold for theinsertion of the ends of the rolled sections.

When the rods or rod ends are galvanized there are no sharp angles orprojections to receive and hold an undue portion of the galvanizin gmaterial, and the work has a finished appearance, and it is ready foruse. o

By this arrangement the rods are united by a single joint, which rendersthem less liable to be defective at the coupling when in use, and theunion between the brass and iron sections is air and water tight, sothat rust at the points ot contact is prevented when the sections A Bare of iron.

Vhat I claim as new, and desire to secure by Letters Latent, is

I. As an improved article of manufacture, rolled lightning-rod sectionshaving enlarged ends east thereon, substantially as specified.

2. The cast end sections, C D, arranged to preserve the form of therolled sections, and attached therewith by uniting' the cast portionthrough one or more holes, c, substantially as described.

3. The herein-described method ot' forming li ghtnin g-rod couplings bycasting sections to the ends of rolled sections with suilicient metal toform the union by a single joint, substantially as set forth.

EDYVARD S. TURNER.

